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Electronic Journal of Biotechnology
Universidad Católica de Valparaíso
ISSN: 0717-3458
Vol. 10, No. 3, 2007, pp. 368 - 375
Bioline Code: ej07035
Full paper language: English
Document type: Research Article
Document available free of charge

Electronic Journal of Biotechnology, Vol. 10, No. 3, 2007, pp. 368 - 375

 en Biosorption of lead by the brown seaweed Sargassum filipendula check for this species in other resources - batch and continuous pilot studies
Vieirao, Denise Mesquita; da Costa, Antonio Carlos Augusto; Henriques, Cristiane Assumpção; Cardoso, Vicelma Luiz & de França, Francisca Pessôa

Abstract

The biosorption of lead by the brown alga Sargassum filipendula was studied. pH 4.0 was the optimum value for the biosorption of lead. Isotherms indicated that for solutions containing 0.03 ± 0.001 up to 3.27 ± 0.04 mmol/L of lead, 2.0g/L was the optimum biomass concentration. The Langmuir model was fitted to represent the experimental data, and the kinetics of biosorption presented equilibrium in 30 min. The continuous system operated for 56 hrs presenting a 100% binding of ionic lead, which corresponds to an accumulation of 168 g lead, equivalent to a load of 1.7 mmol ionic lead/g Sargassum filipendula. The results that were obtained in a continuous system showed a gradual saturation of the biomass in the reactors.

Keywords
biosorption, biosorption equilibrium, continuous system, lead, Sargassum filipendula.

 
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